MP28275EL-LF-P Equivalent & Substitute Parts

Part Overview

The MP28275EL-LF-P is a buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for step-down voltage conversion with positive adjustable output. This device delivers 5A output current with a fixed switching frequency of 1.1MHz and operates across an input voltage range of 4.5V to 7V. The part is marked as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and designs requiring similar buck regulation functionality with comparable electrical and mechanical characteristics.

Substiute Parts

MP28275EL-LF-P

Monolithic Power Systems Inc.In Stock: 1190MP28275EL-LF-P Datasheet

Current PartRFQ

TPS63020DSJR

Texas InstrumentsIn Stock: 23355TPS63020DSJR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP28275EL-LF-P is determined by the following critical parameters:

• Topology & Function: Buck (step-down) regulation with positive adjustable output
• Package Compatibility: 14-VFDFN Exposed Pad surface mount package
• Output Current Capability: Minimum 5A rated output current
• Input Voltage Range: Support for 4.5V to 7V input operation
• Output Voltage Range: Adjustable output from 0.8V minimum to at least 6.3V maximum
• Synchronous Rectification: Integrated synchronous rectifier for efficiency
• Compliance: ROHS3 compliant, REACH unaffected status

The TPS63020DSJR from Texas Instruments is listed as a manufacturer-recommended substitute. However, this device operates as a buck-boost topology with different electrical specifications, including a lower output current rating (4.6A vs. 5A) and different input/output voltage ranges. Substitution requires careful evaluation of application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

The MP28275EL-LF-P is classified as "Not For New Designs," making substitute part identification critical for ongoing support. The TPS63020DSJR carries "Active" product status from Texas Instruments, ensuring long-term availability and manufacturing support.

Both devices are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Both feature 14-VFDFN Exposed Pad packaging with surface mount compatibility, allowing potential PCB layout reuse with minor design adjustments.

Key differences require application-level assessment:

• The TPS63020DSJR operates as a buck-boost converter, providing greater input voltage flexibility (1.8V to 5.5V) compared to the buck-only MP28275EL-LF-P (4.5V to 7V). This topology change affects circuit behavior and efficiency characteristics.
• Output current capability differs: MP28275EL-LF-P delivers 5A, while TPS63020DSJR delivers 4.6A. Applications requiring full 5A output cannot use the substitute without design modification.
• Output voltage maximum differs: MP28275EL-LF-P supports 6.3V, while TPS63020DSJR supports 5.5V. Applications requiring output above 5.5V are incompatible with the substitute.
• Switching frequency differs: MP28275EL-LF-P operates at 1.1MHz, while TPS63020DSJR operates at 2.4MHz. This affects inductor selection, PCB layout, and EMI characteristics.

Selection of the TPS63020DSJR is appropriate only when application requirements fall within its electrical specifications and the buck-boost topology provides functional benefit.

Frequently Asked Questions (FAQ)

Q: Can the TPS63020DSJR directly replace the MP28275EL-LF-P without PCB modifications?

A: Package compatibility (14-VFDFN Exposed Pad) allows potential pin-level substitution. However, the different topologies (buck vs. buck-boost), switching frequencies (1.1MHz vs. 2.4MHz), and output current ratings (5A vs. 4.6A) require circuit design review. PCB layout adjustments for inductor and filter components are likely necessary.

Q: What is the primary reason for seeking a substitute for the MP28275EL-LF-P?

A: The MP28275EL-LF-P is marked "Not For New Designs," indicating end-of-life status. Substitute parts are necessary for production continuity, field replacements, and maintenance of existing systems using this regulator.

Q: Are there electrical parameter ranges where the TPS63020DSJR cannot substitute for the MP28275EL-LF-P?

A: Yes. Applications requiring output current above 4.6A, output voltage above 5.5V, or input voltage above 7V cannot use the TPS63020DSJR. Additionally, applications optimized for 1.1MHz switching frequency may experience different EMI and thermal characteristics at 2.4MHz.

Q: Do both parts meet current compliance standards?

A: Yes. Both the MP28275EL-LF-P and TPS63020DSJR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the significance of the buck-boost topology difference?

A: The MP28275EL-LF-P uses buck (step-down only) topology, while the TPS63020DSJR uses buck-boost (step-up/step-down) topology. Buck-boost converters can maintain output voltage regulation across a wider input voltage range but typically have higher component counts and different efficiency profiles. This topology change affects circuit design, efficiency, and application suitability.

Q: Are the packages physically identical?

A: Both devices use 14-VFDFN Exposed Pad packaging with surface mount mounting type. Physical footprints are compatible, but internal die and pin functionality differ due to topology differences. Pin-to-pin compatibility requires detailed datasheet review.